3.1 Ext2/3/4

Support: native, working libraries from e2fsprogs / libext2fs.

Compiling requirements:

• development package for the ext2 file system library, libext2fs (usually included in something like e2fsprogs-devel). If you don’t have anything like this installed or available (check twice), then go to
  http://e2fsprogs.sf.net/
  Then compile and install that package. Ext4 support requires new enough versions, like 1.41.

Operations:

• wiping the free space
• wiping free space in partially used blocks (NOTE: may print errors on sparse files and other exotic objects)
• wiping deleted files’ data (part of free space or partially used blocks), wiping deleted files’ names and setting deleted files’ names’ lengths once to zero
• wiping the journal